At around midday on Saturday March 1, a male aged between 20 - 30 indecently exposed himself to two girls, aged nine and 11.
The man is described as white, of athletic build, with dark brown hair which was gelled.
He was wearing a blue top with brown knee-length shorts and ‘distinctive’ trainers.
The incident happened near California Country Park, in Finchampstead.
Insp Emily Evans, neighbourhood Inspector for Wokingham, added: “This is a concerning incident and as you can imagine it was a distressing experience for the young girls.
“We have increased patrols in the area so if anyone has any concerns, I will ask you to speak to the officers in the area. If you have any information about the incident or the man please call 101.
“I can confirm that the girls were uninjured.”
If you have information contact the police on 101 or call Crimestoppers on 0800 555 111.